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You searched for +publisher:"University of Houston" +contributor:("Bowman, Kevin"). One record found.

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University of Houston

1. Souri, Amirhossein 1989-. Constraining NOx Emissions Using Spaceborne and Airborne Remotely Sensed NO2 Observations in the Southeast Texas.

Degree: Earth and Atmospheric Sciences, Department of, 2018, University of Houston

Nitrogen oxides (NOx=NO+NO2) largely contribute to ozone formation which is a criterion air pollutant adversely affecting human health and crop yields. They are emitted by a range of anthropogenic and natural sources. The anthropogenic emissions are commonly estimated from the bottom-up inventories which are complicated by errors in underlying assumptions and county-level statistics. Therefore, the bottom-up NOx emissions could induce large biases and quickly become obsolete, which in turn introduce an obstacle for chemical transport models that heavily rely on this information. NO2 (a proxy for NOx) molecules have strong absorption in the ultra-violent wavelengths which facilitates their retrieval from several remote sensing sensors. We use tropospheric NO2 columns from Ozone Monitoring Instrument (OMI) to provide constraints on the bottom-up emissions using a Bayesian inversion in conjunction with the Community Multiscale Air Quality (CMAQ) model associated with Decoupled Direct Method (DDM) in Southeast Texas during DISCOVER-AQ campaign. Results suggest a reduction in area (44%), mobile (30%), and point sources (60%) in high NOx areas (ENOx> 0.2 mol/s). The top-down estimation largely mitigates the overprediction of the model in reproducing surface NO2 against monitoring sites. However, under-prediction of model NO2 in Houston on 09/25–09/26 potentially resulting from the unprecedented local NOx sources from the Houston Ship Channel (HSC) becomes more evident. To address this, we utilize, for the first time, the NO2 columns from the Geostationary Coastal and Air Pollution Events Airborne Simulator (GCAS) to constrain NOx emissions in the Houston‐Galveston‐Brazoria area. To incorporate the observations into an analytical inversion, we convert the slant density columns to vertical columns using a radiative transfer model with i) NO2 profiles from a high‐resolution regional model (1×1 km2) constrained by P‐3B aircraft measurements, ii) the consideration of aerosol optical thickness impacts on radiance at NO2 absorption line, and iii) high‐resolution surface albedo constrained by ground‐based spectrometers. The modest high-quality observations from this airborne sensor enable us to quantify the unprecedented local emissions. The capability of GCAS at detecting such an event ensures the significance of forthcoming geostationary satellites for timely estimates of top‐down emissions. Advisors/Committee Members: Choi, Yunsoo (advisor), Rappenglueck, Bernhard (committee member), Jiang, Xun (committee member), Bowman, Kevin (committee member).

Subjects/Keywords: inverse modeling; emissions; remote sensing

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Souri, A. 1. (2018). Constraining NOx Emissions Using Spaceborne and Airborne Remotely Sensed NO2 Observations in the Southeast Texas. (Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/3441

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Souri, Amirhossein 1989-. “Constraining NOx Emissions Using Spaceborne and Airborne Remotely Sensed NO2 Observations in the Southeast Texas.” 2018. Thesis, University of Houston. Accessed August 23, 2019. http://hdl.handle.net/10657/3441.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Souri, Amirhossein 1989-. “Constraining NOx Emissions Using Spaceborne and Airborne Remotely Sensed NO2 Observations in the Southeast Texas.” 2018. Web. 23 Aug 2019.

Vancouver:

Souri A1. Constraining NOx Emissions Using Spaceborne and Airborne Remotely Sensed NO2 Observations in the Southeast Texas. [Internet] [Thesis]. University of Houston; 2018. [cited 2019 Aug 23]. Available from: http://hdl.handle.net/10657/3441.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Souri A1. Constraining NOx Emissions Using Spaceborne and Airborne Remotely Sensed NO2 Observations in the Southeast Texas. [Thesis]. University of Houston; 2018. Available from: http://hdl.handle.net/10657/3441

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

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